KARAZHAN (10-man raid) (Deadwind Pass): Everyone in the group is required to have The Master's Key in order to enter Karazhan. The quest line for it starts right in front of the tower with a woman. She will give you two soloable quests which are done outside of the tower. You must then travel to Dalaran and speak with a mage on the northern side of the city. You will then receive a quest to get the First Key Fragment from a container near Murmur in the Shadow Labyrinth (level 70 Auchindoun wing). Once you complete that quest, you are then instructed to retrieve the Second Key Fragment from The Arcatraz (level 70Tempest Keep wing) and the Third Key Fragment from Steamvault (level 70 Colfang Reservoir wing). After you collect all three fragments you must complete the Opening the Dark Portal (Escape from Durnholde must be completed first in order to be able to enter the Opening the Dark Portal) inside the Caverns of Time to have Medivh complete the key.

HELLFIRE CITADEL (Hellfire Peninusla)

Shattered Halls (level 70 wing): Only one person in your group needs the key to open the gate in front of Shattered Halls. Also, a level 70 rogue with 350 lockpicking can pick the gate. The quest to make the key starts in Shadowmoon Valley by killing Smith Gorlunk who is located on the Ata'mal Terrance of the Black Temple. He will drop a mold which starts the quest line to obtain the key.

Heroic Mode : To put any of the Hellfire Citadel instances in Heroic Mode, you must be Revered with Honor Hold if you are Alliance, or Thrallmar if you are Horde. The key can be purchased from the appropriate town's quartermaster.

COILFANG RESERVOIR (Zangarmarsh)

Serpentshrine Cavern (25-man raid): To get attuned for the Lady Vashj instance, you must enter the Slave Pens (level 62-64 Coilfang Reservoir wing) on Heroic Mode. Shortly after the first boss you will find Skar'this the Heretic captive in a cage. He will offer the quest "The Cudgel of Kar'desh". For this quest you must retrieve an item from Gruul the Dragonkiller (Gruul's Lair (25-man raid)) and Nightbane (Karazhan). After collecting these two items, you can return to him and he will cast a spell on you which will allow you to enter the Serpentshrine Cavern.

Heroic Mode: To put any of the Coilfang Reservoir instances in Heroic Mode, you must be Revered with Cenarion Expedition. The key can be purchased from the quartermaster in Cenarion Refuge, Zangarmarsh.

AUCHINDOUN (Terokkar Forest)

Shadow Labyrinth (level 70 wing): Like The Shattered Halls, only one person in the group needs a key to allow everyone inside. The key for the Shadow Labyrinth drops from the final boss in Sethekk Halls (level 67-69 Auchindoun wing), Talon King Ikiss.

Heroic Mode: To put any of the Auchindoun instances in Heroic Mode, you must be Revered with the Lower City. The key can be purchased from the quartermaster in the Lower City area of Shattrath City in Terokkar Forest.

The Arcatraz (level 70 wing): Again like The Shattered Halls, you only need 1 key in the group or a level 70 rogue with 350 lockpicking. To obtain the key for The Arcatraz you must complete the Stormspire quest line in Netherstorm. Your quest will end you at A'dal in Shattrath City who will send you to get two pieces of the key and forge them together. The Bottom Shard of the Arcatraz Key drops from Pathaleon the Calculator in The Mechanar (level 70 Tempest Keep wing) and the Top Shard of the Arcatraz Key drops from Warp Splinter in The Botanica (level 70 Tempest Keep wing).

The Eye (25-man raid): Everyone in the raid must have The Tempest Key in order to enter The Eye. There is no door to open but the key is rather a passive attunement much like the Drakefire Amulet. Once you complete the Cipher of Damnation quest line in Shadowmoon Valley you will recieve a letter from Khadgar in the mail asking for you to come talk with him. He will instruct you to talk with A'dal and you will then recieve three quests. Trial of the Naaru: Mercy - You must complete Shattered Halls (level 70 Hellfire Citadel wing) on Heroic Mode. Trial of the Naaru: Strength - You must complete Shadow Labyrinth (level 70 Auchindoun wing) on Heroic Mode. Trial of the Naaru: Tenacity - You must complete The Arcatraz (level 70 Tempest Keep Wing) on Heroic Mode. After completing all three trials you will be awarded The Tempest Key which allows access into The Eye.

Heroic Mode: To put any of the Tempest Keep instances in Heroic Mode, you must be Revered with the Sha'tar. The key can be purchased from the quartermaster in Shattrath City, Terokkar Forest.